class MIS(object):
    def verify_user(self,p_user):
        if len(p_user)==0:
            return False
        else:
            return True

    def verify_pwd(self,p_pwd):
            if len(p_pwd) >5 and len(p_pwd) <13:
                return True
            else:
                return False

    def login(self,p_user,p_pwd):
        if self.verify_user(p_user) and self.verify_pwd(p_pwd):
            print('登陆成功')
        else:
            print('登陆失败')

a=MIS()
a.login('kening','909889')